如何优化此Javascript代码，使其从图像中链接到IGNORES [英] How can I refine this Javascript code so it IGNORES links from images

问题描述

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{Please note - this question is the opposite/inverse of an existing StackOverflow question that is too complex to answer there}

我想对现在，它代替作用于所有链接，我能否只查看来自文本的链接?

Now, instead of it acting on all links, can I get it to only look at links that are from text?

下面是一个HTML代码段，用于显示我的意思:

Here is an HTML snippet to show what I mean:

<a href="/shop/product?ie=UTF8&amp;asin=Z00FDLN878&amp;tab=UK_Default" target="_blank"><img width="125" height="125" border="0" src="http://ecx.images-amazon.com/images/I/01W9a7gwosL.jpg" alt="43453"></a>

那是图像链接-我不希望它对它起作用.

That's an image link - I do NOT want it to act on that.

推荐答案

在直接javascript/DOM 中，在循环浏览链接时进行测试:

In straight javascript / DOM, test the links as you loop through them:

var base        = 'https://www.example.co.uk/gp/wine/order?ie=UTF8&asin=';
var linksNoImg  = document.querySelectorAll ("a[href*='asin']");

for (var J = linksNoImg.length - 1;  J >= 0;  --J) {
    var imgLink = linksNoImg[J];

    //--- Make sure it's not an image link:
    if ( ! imgLink.querySelector ('img') ) {
        //--- Check each link for the 'asin' value
        var result  = /asin=([\d\w]+)/.exec (imgLink.getAttribute ('href') );
        if (result) {
            // make a new url using the 'base' and the 'asin' value
            imgLink.setAttribute ('href', base+result[1]);
        }
    }
}

jQuery 可让您仅预选择正确的链接:

jQuery lets you preselect only the correct links:

//--- The new base URL
var base        = ' https://www.example.co.uk/gp/wine/order?ie=UTF8&asin=';
var linksNoImg  = $("a[href*='asin']:not(:has(img))");

linksNoImg.each ( function () {
    // check each link for the 'asin' value
    var result = /asin=([\d\w]+)/.exec(links[i].getAttribute('href'));
    if(result){
        // make a new url using the 'base' and the 'asin' value
        links[i].setAttribute('href', base+result[1]);
    }
} );

但这需要您在Greasekit中加载jQuery-对于最简单的脚本，这是非常值得的.

But this requires you to load jQuery in Greasekit -- which is well worth it for any but the simplest scripts.

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